Power air-pump.



Patented Sept. 15,1908.

UNITED STATES WILLARD J. SPENCER, OF WATERRURY, CONNECTICUT.

rowan AIR-PUMP.

Specification of Letters'Patent.

Patented Sept. 15. 1908.

Application filed November 25 1907. Serial No. 403,702.

T 0 all whom it may concern:

Be it known that I, WILLARD J. SPENCER,

a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Power Air- Pumps; and I do hereby declare the following, when taken in connection with the accompanyin drawings and the letters of reference marked thereon, to-be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1 a view in side elevation of my improved power air-pump shown with its drivmg wheel in engagement with the flywheel of the motor as well as with the driven wheel of the pump, and therefore in readiness for utilizing the motor to inflate the tires of the car or producing air pressures for any other desired pur ose. Fig. 2 a view of the umppartly in p tion. Fig. 3 a view of the ump in inside elevation, its driving wheel 'eing in this case shown in its normal or retired osition in which it is disen aged from the y wheel of the motor, its riven-wheel being broken away to show the adjustable and swinging arms arranged concentric with the said wheel, and the frame being shown by broken lines in one of the obli ue positions in which it may be applied to t e frame of the car. I

My invention relates to an improvement inv power air-pumps for.installation upon automobiles, for furnishing air under pressure for inflating their tires, for their gasolene tanks, whistles, etc., the object being to produce a simple, compact, durable and efficient pump constructed with articular reference to convenience of insta lation.

With these'ends in view, my invention consists in a power air-pump having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carr ing out my invention I employ a driving-wheel 2 made ofvulcanized fiber or other equivalent material and having a large, central bearing-hole 3 adapting it to be loosely mounted upon a stud 4 in osition to engage with the periphery of tie driven wheel 5 of the pump. The said stud 4 passes transversely through the outer end of a swinging arm 6 extending beyond the peri hery of the wheel 5 and radially arranged with respect to the said wheel so. as to swing an and partly in-horizonta sec-.

on the axis'thereof'sothat the swinging movement of the arm will never carry the wheel 2 away from the periphery of the wheel 4. At itsupper end the arm 6 is provided with a sleeve 7 which is mounted upon the journal .8 of the wheel 4 as shown in Fig. 2, the turning of the sleeve 7 upon the journal 8 providing for the swinging of the arm 6 as described.

The wheel 2 is normally held out of engagement with the fly wheel 9 of the motor by means of a' cam .10 at the inner end of a lever 11 hun u on a stud 12 in the lower end of a normally 'xed butadjustable arm 13 radially arranged with respectto the driven wheel 4 and extending alongside of the arm 6,

'though not quite, parallel therewith. Normally the cam 10 engages with the stud 4 and holds the wheel 2 away from the periphery of the fly wheel 9 against the tension of a spring 14 en aging with the stud and itself carried by t e arm 13, the said cam and spring engaging with the opposite faces of t e stud as clearly shown in Fig. 1.' When the lever 11 is thrown intoits retired position so as to clear the cam 10 from the stud 4, the spring 14 asserts itself to swing the arm 6 upward and lift the wheel 2 into engagement witlithefly wheel 9 without, however, disengaging the wheel 2 from the driven wheel 4', the lateral play of the wheel 2 upon the stud 4 due to the enlarged bearing hole 3 enabling the wheel 2 to accommodate itself in position for engagement with the fly wheel 9, as well as with the driven wheel .4 which through the driving wheel 2 is thus driver by the flywheel 9f i At its upper end the arm 13 is furnished V with a sleeve 15 large enough-to receive the sleeve 7 for which it forms a bearing. Under this construction both the swinging 'arm 6 and the normally fixed or adjustable arm 13 are arranged to turn upon an axis concentric with that of the driven wheel 4. The said sleeve 15 is mounted in the inner arm of a yoke 16 and held in place against rotation by a bearing cap. 17 secured in the usual manner to the said arm by nuts 18 which are loosened to permit the arm 13 to be adjusted as may be required at the time of the initial installation of the pump upon the frame of the autobase-plate 21 located at a right angle to the web 20 and in the plane of the driven wheel 4, this web being provided with screw holes 22 for its attachment to the frame of'a car or other vehicle. When the pump is installed the base-plate 21 and whee 4 will stand in a vertical plane. The said yoke 16, cylinder 19, web 20 and base-plate 21 are all cast by preference in one iece, and constitute, as it were, the frame 0 the pum or, as may be said, a cylinder-containm ame. The cylinder 19' is furnished wit nected bya iston rod 24 to a crank 25 the inner journa 8 of which has already been referred to, and the outer journal 26 of which has bearing in the outer arm of the yoke 16 in which it is held in place by an ordinary bearing cap 27. The cylinder 19 is furnished with a removable head 28 having a nipple 29 through which the air compressed in the cylinder is conducted to the tires of the wheels or to any other point where it is to be used.

I by ful lines in Fig. 3, or in an inclined or ique position as indicated b broken lines in the said figure. The partic ar inclination of the frame of the pump will be dictated by circumstances, and is not material, but in any event the base-plate 21 will stand in a vertical plane. The broken lines in Fig. 3 must be understood, therefore, to indicate only one of the inclined positions which the frame of the pump may take. After the late 21 has been secured in place the nuts 18 will be loosened to permit the adjustable arm 13 to be set in the position re uired to locate the driving wheel 2 close to but just out of contact with the fly wheel 9. After the arm 13 has been 'so set the nuts 18 wilLbe tightened so as tofix the arm inthat osition. In this way thearms 6 and 13 are s ifted as may be re uired with respect to the longitudinal axiso the pump frame considered as a castm By locating the driven-wheel and baseplate of my improved power air-pump in the same plane I secure an amountof convenience in installing the ump u on the frames of motor cars hereto ore un own as the pump may be applied to the frame of almost any car without the use of an intermediate bracket or corresponding part, whereas great difliculty is found in applying power airumps as heretofore constructed to the rames of motor cars and to many cars they can not be ap lied at all without the use of some interme late parts.

a piston 23 con-.

the installation of the ump upon the frame of an automobile, the ase-plate may be applied directly to the frame without the use of a bracket or. other intermediate part.

2. In a power air-pump, the combination with a frame comprisin a cylinder and a baselate, of a driven w eel carried by the said rame andlocated in the plane of the said base-plate, a swinging arm carried by the frame and havin the same center as the said driven wheel, a riving-wheel carried by the said arm in position to engage with the said driven-wheel for driving the same, an ad'ustable arm having the same center as the driven-wheel, and means carried by the adjustable arm for controlling the position of thedriving-wheel carried by the swinging arm.

3. Ina power air-pump, the combinationwith a frame comprism alcylinder and a baselate, of a driven-w ee carri d b the said rame, a swinging arm mounted in the said frame concentric with the driven-wheel and extendingbeyond the periphery thereof, a driving-wheel mountedin the outer end of the said swinging arm in position to engage the said frame and swinging on the axis of the said wheel, a driving-wheel mounted in the swinging arm, and means applied to the normally fixed adjustable arm for controlling the osition of the driving wheel with respect to tfie fly-wheel of a motor.

In testimony whereof, I have signedthis specification in the presence of two subscribing witnesses.

WILLARD J: SPENCEP Witnesses:

CLARA L. WEED, GEORGE D. SEYMOUR. 

